Draftsight 2019 not working well after installation

Hello everyone

Since I switched to the 2019 version of Draftsight, I'm experiencing a lot of problems. While the 2018 version was working perfectly.

The main problems are:

  • certain dwg's can't be opened while others can
  • a lot of commands result in an ERROR
  • nothing of settings/properties can be changed

Since we all have the same laptops in our company and this is only the case with me, I was wondering if any of you have had similar problems with the 2019 version of Draftsight.

I've reinstalled the software several times, but in vain. 

Can somebody help me with this?
Thank you in advance!